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Open AccessReview

A Review of Orbital Angular Momentum Vortex Beams Generation: From Traditional Methods to Metasurfaces

1
Department of Microwave Engineering, Harbin Institute of Technology, Harbin 150001, China
2
LEME, UPL, Univ Paris Nanterre, F92410 Ville d’Avray, France
*
Authors to whom correspondence should be addressed.
Appl. Sci. 2020, 10(3), 1015; https://doi.org/10.3390/app10031015
Received: 30 December 2019 / Revised: 18 January 2020 / Accepted: 30 January 2020 / Published: 4 February 2020
(This article belongs to the Special Issue Advanced Active and Passive Metasurfaces)
In this paper, we review the generation of vortex beams carrying orbital angular momentum in the microwave domain. We firstly present the theory of Laguerre–Gaussian beams where it is demonstrated that they carry such type of momentum. We further provide an overview of the classical methods used to generate orbital angular momentum vortex beams, which rely on two main methods; plane wave to vortex wave conversion and direct generation using radiating antennas. Then, we present recent progress in the physics of metasurfaces devoted to the generation of vortex beams with a discussion about reflective and transmissive metasurfaces for plane wave to vortex wave conversion as well as methods to reduce the intrinsic divergence characteristics of vortex beams. Finally, we conclude on this rapidly developing research field. View Full-Text
Keywords: vortex beams; orbital angular momentum; microwave antennas; metasurfaces vortex beams; orbital angular momentum; microwave antennas; metasurfaces
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MDPI and ACS Style

Zhang, K.; Wang, Y.; Yuan, Y.; Burokur, S.N. A Review of Orbital Angular Momentum Vortex Beams Generation: From Traditional Methods to Metasurfaces. Appl. Sci. 2020, 10, 1015.

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